View host status

You can view the
individual hosts in your cluster on Ambari Web > Hosts.

Hosts lists cluster hosts by fully qualified domain name (FDQN) and
accompanied by a colored icon that indicates the host's operating status.

Observe the icon beside each listed host name.

Red Triangle

At least one master component on that host is down. You can hover your cursor
over the host name to see a tooltip that lists affected components.

Orange

At least one slave component on that host is down. Hover to see a tooltip that
lists affected components.

Yellow

Ambari Server has not received a heartbeat from that host for more than 3
minutes.

Green

Normal running state.

Maintenace Mode

Black, medical-bag icon indicates a host in maintenance mode.

Alert

Red square with white number indicates the number of alerts generated on a
host.

A red icon overrides an orange icon, which overrides a yellow icon. In other words, a
host that has a master component down is accompanied by a red icon, even though it might
have slave component or connection issues as well. Hosts in maintenance mode or are
experiencing alerts, are accompanied by an icon to the right of the host name.

The
following example Hosts page shows three hosts, one having a
master component down, one having a slave component down, one running normally, and two
with alerts: